1 /*
2 * USBVISION.H
3 * usbvision header file
4 *
5 * Copyright (c) 1999-2005 Joerg Heckenbach <joerg@heckenbach-aw.de>
6 * Dwaine Garden <dwainegarden@rogers.com>
7 *
8 *
9 * Report problems to v4l MailingList: linux-media@vger.kernel.org
10 *
11 * This module is part of usbvision driver project.
12 * Updates to driver completed by Dwaine P. Garden
13 * v4l2 conversion by Thierry Merle <thierry.merle@free.fr>
14 *
15 * This program is free software; you can redistribute it and/or modify
16 * it under the terms of the GNU General Public License as published by
17 * the Free Software Foundation; either version 2 of the License, or
18 * (at your option) any later version.
19 *
20 * This program is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 * GNU General Public License for more details.
24 *
25 * You should have received a copy of the GNU General Public License
26 * along with this program; if not, write to the Free Software
27 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
28 */
29
30
31 #ifndef __LINUX_USBVISION_H
32 #define __LINUX_USBVISION_H
33
34 #include <linux/list.h>
35 #include <linux/usb.h>
36 #include <linux/i2c.h>
37 #include <linux/mutex.h>
38 #include <media/v4l2-device.h>
39 #include <media/tuner.h>
40 #include <linux/videodev2.h>
41
42 #define USBVISION_DEBUG /* Turn on debug messages */
43
44 #define USBVISION_PWR_REG 0x00
45 #define USBVISION_SSPND_EN (1 << 1)
46 #define USBVISION_RES2 (1 << 2)
47 #define USBVISION_PWR_VID (1 << 5)
48 #define USBVISION_E2_EN (1 << 7)
49 #define USBVISION_CONFIG_REG 0x01
50 #define USBVISION_ADRS_REG 0x02
51 #define USBVISION_ALTER_REG 0x03
52 #define USBVISION_FORCE_ALTER_REG 0x04
53 #define USBVISION_STATUS_REG 0x05
54 #define USBVISION_IOPIN_REG 0x06
55 #define USBVISION_IO_1 (1 << 0)
56 #define USBVISION_IO_2 (1 << 1)
57 #define USBVISION_AUDIO_IN 0
58 #define USBVISION_AUDIO_TV 1
59 #define USBVISION_AUDIO_RADIO 2
60 #define USBVISION_AUDIO_MUTE 3
61 #define USBVISION_SER_MODE 0x07
62 #define USBVISION_CLK_OUT (1 << 0)
63 #define USBVISION_DAT_IO (1 << 1)
64 #define USBVISION_SENS_OUT (1 << 2)
65 #define USBVISION_SER_MODE_SOFT (0 << 4)
66 #define USBVISION_SER_MODE_SIO (1 << 4)
67 #define USBVISION_SER_ADRS 0x08
68 #define USBVISION_SER_CONT 0x09
69 #define USBVISION_SER_DAT1 0x0A
70 #define USBVISION_SER_DAT2 0x0B
71 #define USBVISION_SER_DAT3 0x0C
72 #define USBVISION_SER_DAT4 0x0D
73 #define USBVISION_EE_DATA 0x0E
74 #define USBVISION_EE_LSBAD 0x0F
75 #define USBVISION_EE_CONT 0x10
76 #define USBVISION_DRM_CONT 0x12
77 #define USBVISION_REF (1 << 0)
78 #define USBVISION_RES_UR (1 << 2)
79 #define USBVISION_RES_FDL (1 << 3)
80 #define USBVISION_RES_VDW (1 << 4)
81 #define USBVISION_DRM_PRM1 0x13
82 #define USBVISION_DRM_PRM2 0x14
83 #define USBVISION_DRM_PRM3 0x15
84 #define USBVISION_DRM_PRM4 0x16
85 #define USBVISION_DRM_PRM5 0x17
86 #define USBVISION_DRM_PRM6 0x18
87 #define USBVISION_DRM_PRM7 0x19
88 #define USBVISION_DRM_PRM8 0x1A
89 #define USBVISION_VIN_REG1 0x1B
90 #define USBVISION_8_422_SYNC 0x01
91 #define USBVISION_16_422_SYNC 0x02
92 #define USBVISION_VSNC_POL (1 << 3)
93 #define USBVISION_HSNC_POL (1 << 4)
94 #define USBVISION_FID_POL (1 << 5)
95 #define USBVISION_HVALID_PO (1 << 6)
96 #define USBVISION_VCLK_POL (1 << 7)
97 #define USBVISION_VIN_REG2 0x1C
98 #define USBVISION_AUTO_FID (1 << 0)
99 #define USBVISION_NONE_INTER (1 << 1)
100 #define USBVISION_NOHVALID (1 << 2)
101 #define USBVISION_UV_ID (1 << 3)
102 #define USBVISION_FIX_2C (1 << 4)
103 #define USBVISION_SEND_FID (1 << 5)
104 #define USBVISION_KEEP_BLANK (1 << 7)
105 #define USBVISION_LXSIZE_I 0x1D
106 #define USBVISION_MXSIZE_I 0x1E
107 #define USBVISION_LYSIZE_I 0x1F
108 #define USBVISION_MYSIZE_I 0x20
109 #define USBVISION_LX_OFFST 0x21
110 #define USBVISION_MX_OFFST 0x22
111 #define USBVISION_LY_OFFST 0x23
112 #define USBVISION_MY_OFFST 0x24
113 #define USBVISION_FRM_RATE 0x25
114 #define USBVISION_LXSIZE_O 0x26
115 #define USBVISION_MXSIZE_O 0x27
116 #define USBVISION_LYSIZE_O 0x28
117 #define USBVISION_MYSIZE_O 0x29
118 #define USBVISION_FILT_CONT 0x2A
119 #define USBVISION_VO_MODE 0x2B
120 #define USBVISION_INTRA_CYC 0x2C
121 #define USBVISION_STRIP_SZ 0x2D
122 #define USBVISION_FORCE_INTRA 0x2E
123 #define USBVISION_FORCE_UP 0x2F
124 #define USBVISION_BUF_THR 0x30
125 #define USBVISION_DVI_YUV 0x31
126 #define USBVISION_AUDIO_CONT 0x32
127 #define USBVISION_AUD_PK_LEN 0x33
128 #define USBVISION_BLK_PK_LEN 0x34
129 #define USBVISION_PCM_THR1 0x38
130 #define USBVISION_PCM_THR2 0x39
131 #define USBVISION_DIST_THR_L 0x3A
132 #define USBVISION_DIST_THR_H 0x3B
133 #define USBVISION_MAX_DIST_L 0x3C
134 #define USBVISION_MAX_DIST_H 0x3D
135 #define USBVISION_OP_CODE 0x33
136
137 #define MAX_BYTES_PER_PIXEL 4
138
139 #define MIN_FRAME_WIDTH 64
140 #define MAX_USB_WIDTH 320 /* 384 */
141 #define MAX_FRAME_WIDTH 320 /* 384 */ /* streching sometimes causes crashes*/
142
143 #define MIN_FRAME_HEIGHT 48
144 #define MAX_USB_HEIGHT 240 /* 288 */
145 #define MAX_FRAME_HEIGHT 240 /* 288 */ /* Streching sometimes causes crashes*/
146
147 #define MAX_FRAME_SIZE (MAX_FRAME_WIDTH * MAX_FRAME_HEIGHT * MAX_BYTES_PER_PIXEL)
148 #define USBVISION_CLIPMASK_SIZE (MAX_FRAME_WIDTH * MAX_FRAME_HEIGHT / 8) /* bytesize of clipmask */
149
150 #define USBVISION_URB_FRAMES 32
151
152 #define USBVISION_NUM_HEADERMARKER 20
153 #define USBVISION_NUMFRAMES 3 /* Maximum number of frames an application can get */
154 #define USBVISION_NUMSBUF 2 /* Dimensioning the USB S buffering */
155
156 #define USBVISION_POWEROFF_TIME (3 * HZ) /* 3 seconds */
157
158
159 #define FRAMERATE_MIN 0
160 #define FRAMERATE_MAX 31
161
162 enum {
163 ISOC_MODE_YUV422 = 0x03,
164 ISOC_MODE_YUV420 = 0x14,
165 ISOC_MODE_COMPRESS = 0x60,
166 };
167
168 /* This macro restricts an int variable to an inclusive range */
169 #define RESTRICT_TO_RANGE(v, mi, ma) \
170 { if ((v) < (mi)) (v) = (mi); else if ((v) > (ma)) (v) = (ma); }
171
172 /*
173 * We use macros to do YUV -> RGB conversion because this is
174 * very important for speed and totally unimportant for size.
175 *
176 * YUV -> RGB Conversion
177 * ---------------------
178 *
179 * B = 1.164*(Y-16) + 2.018*(V-128)
180 * G = 1.164*(Y-16) - 0.813*(U-128) - 0.391*(V-128)
181 * R = 1.164*(Y-16) + 1.596*(U-128)
182 *
183 * If you fancy integer arithmetics (as you should), hear this:
184 *
185 * 65536*B = 76284*(Y-16) + 132252*(V-128)
186 * 65536*G = 76284*(Y-16) - 53281*(U-128) - 25625*(V-128)
187 * 65536*R = 76284*(Y-16) + 104595*(U-128)
188 *
189 * Make sure the output values are within [0..255] range.
190 */
191 #define LIMIT_RGB(x) (((x) < 0) ? 0 : (((x) > 255) ? 255 : (x)))
192 #define YUV_TO_RGB_BY_THE_BOOK(my, mu, mv, mr, mg, mb) { \
193 int mm_y, mm_yc, mm_u, mm_v, mm_r, mm_g, mm_b; \
194 mm_y = (my) - 16; \
195 mm_u = (mu) - 128; \
196 mm_v = (mv) - 128; \
197 mm_yc = mm_y * 76284; \
198 mm_b = (mm_yc + 132252 * mm_v) >> 16; \
199 mm_g = (mm_yc - 53281 * mm_u - 25625 * mm_v) >> 16; \
200 mm_r = (mm_yc + 104595 * mm_u) >> 16; \
201 mb = LIMIT_RGB(mm_b); \
202 mg = LIMIT_RGB(mm_g); \
203 mr = LIMIT_RGB(mm_r); \
204 }
205
206 /* Debugging aid */
207 #define USBVISION_SAY_AND_WAIT(what) { \
208 wait_queue_head_t wq; \
209 init_waitqueue_head(&wq); \
210 printk(KERN_INFO "Say: %s\n", what); \
211 interruptible_sleep_on_timeout(&wq, HZ * 3); \
212 }
213
214 /*
215 * This macro checks if usbvision is still operational. The 'usbvision'
216 * pointer must be valid, usbvision->dev must be valid, we are not
217 * removing the device and the device has not erred on us.
218 */
219 #define USBVISION_IS_OPERATIONAL(udevice) (\
220 (udevice != NULL) && \
221 ((udevice)->dev != NULL) && \
222 ((udevice)->last_error == 0) && \
223 (!(udevice)->remove_pending))
224
225 #define I2C_USB_ADAP_MAX 16
226
227 #define USBVISION_NORMS (V4L2_STD_PAL | V4L2_STD_NTSC | V4L2_STD_SECAM | V4L2_STD_PAL_M)
228
229 /* ----------------------------------------------------------------- */
230 /* usbvision video structures */
231 /* ----------------------------------------------------------------- */
232 enum scan_state {
233 scan_state_scanning, /* Scanning for header */
234 scan_state_lines /* Parsing lines */
235 };
236
237 /* Completion states of the data parser */
238 enum parse_state {
239 parse_state_continue, /* Just parse next item */
240 parse_state_next_frame, /* Frame done, send it to V4L */
241 parse_state_out, /* Not enough data for frame */
242 parse_state_end_parse /* End parsing */
243 };
244
245 enum frame_state {
246 frame_state_unused, /* Unused (no MCAPTURE) */
247 frame_state_ready, /* Ready to start grabbing */
248 frame_state_grabbing, /* In the process of being grabbed into */
249 frame_state_done, /* Finished grabbing, but not been synced yet */
250 frame_state_done_hold, /* Are syncing or reading */
251 frame_state_error, /* Something bad happened while processing */
252 };
253
254 /* stream states */
255 enum stream_state {
256 stream_off, /* Driver streaming is completely OFF */
257 stream_idle, /* Driver streaming is ready to be put ON by the application */
258 stream_interrupt, /* Driver streaming must be interrupted */
259 stream_on, /* Driver streaming is put ON by the application */
260 };
261
262 enum isoc_state {
263 isoc_state_in_frame, /* Isoc packet is member of frame */
264 isoc_state_no_frame, /* Isoc packet is not member of any frame */
265 };
266
267 struct usb_device;
268
269 struct usbvision_sbuf {
270 char *data;
271 struct urb *urb;
272 };
273
274 #define USBVISION_MAGIC_1 0x55
275 #define USBVISION_MAGIC_2 0xAA
276 #define USBVISION_HEADER_LENGTH 0x0c
277 #define USBVISION_SAA7111_ADDR 0x48
278 #define USBVISION_SAA7113_ADDR 0x4a
279 #define USBVISION_IIC_LRACK 0x20
280 #define USBVISION_IIC_LRNACK 0x30
281 #define USBVISION_FRAME_FORMAT_PARAM_INTRA (1<<7)
282
283 struct usbvision_v4l2_format_st {
284 int supported;
285 int bytes_per_pixel;
286 int depth;
287 int format;
288 char *desc;
289 };
290 #define USBVISION_SUPPORTED_PALETTES ARRAY_SIZE(usbvision_v4l2_format)
291
292 struct usbvision_frame_header {
293 unsigned char magic_1; /* 0 magic */
294 unsigned char magic_2; /* 1 magic */
295 unsigned char header_length; /* 2 */
296 unsigned char frame_num; /* 3 */
297 unsigned char frame_phase; /* 4 */
298 unsigned char frame_latency; /* 5 */
299 unsigned char data_format; /* 6 */
300 unsigned char format_param; /* 7 */
301 unsigned char frame_width_lo; /* 8 */
302 unsigned char frame_width_hi; /* 9 */
303 unsigned char frame_height_lo; /* 10 */
304 unsigned char frame_height_hi; /* 11 */
305 __u16 frame_width; /* 8 - 9 after endian correction*/
306 __u16 frame_height; /* 10 - 11 after endian correction*/
307 };
308
309 struct usbvision_frame {
310 char *data; /* Frame buffer */
311 struct usbvision_frame_header isoc_header; /* Header from stream */
312
313 int width; /* Width application is expecting */
314 int height; /* Height */
315 int index; /* Frame index */
316 int frmwidth; /* Width the frame actually is */
317 int frmheight; /* Height */
318
319 volatile int grabstate; /* State of grabbing */
320 int scanstate; /* State of scanning */
321
322 struct list_head frame;
323
324 int curline; /* Line of frame we're working on */
325
326 long scanlength; /* uncompressed, raw data length of frame */
327 long bytes_read; /* amount of scanlength that has been read from data */
328 struct usbvision_v4l2_format_st v4l2_format; /* format the user needs*/
329 int v4l2_linesize; /* bytes for one videoline*/
330 struct timeval timestamp;
331 int sequence; /* How many video frames we send to user */
332 };
333
334 #define CODEC_SAA7113 7113
335 #define CODEC_SAA7111 7111
336 #define CODEC_WEBCAM 3000
337 #define BRIDGE_NT1003 1003
338 #define BRIDGE_NT1004 1004
339 #define BRIDGE_NT1005 1005
340
341 struct usbvision_device_data_st {
342 __u64 video_norm;
343 const char *model_string;
344 int interface; /* to handle special interface number like BELKIN and Hauppauge WinTV-USB II */
345 __u16 codec;
346 unsigned video_channels:3;
347 unsigned audio_channels:2;
348 unsigned radio:1;
349 unsigned vbi:1;
350 unsigned tuner:1;
351 unsigned vin_reg1_override:1; /* Override default value with */
352 unsigned vin_reg2_override:1; /* vin_reg1, vin_reg2, etc. */
353 unsigned dvi_yuv_override:1;
354 __u8 vin_reg1;
355 __u8 vin_reg2;
356 __u8 dvi_yuv;
357 __u8 tuner_type;
358 __s16 x_offset;
359 __s16 y_offset;
360 };
361
362 /* Declared on usbvision-cards.c */
363 extern struct usbvision_device_data_st usbvision_device_data[];
364 extern struct usb_device_id usbvision_table[];
365
366 struct usb_usbvision {
367 struct v4l2_device v4l2_dev;
368 struct video_device *vdev; /* Video Device */
369 struct video_device *rdev; /* Radio Device */
370
371 /* i2c Declaration Section*/
372 struct i2c_adapter i2c_adap;
373 int registered_i2c;
374
375 struct urb *ctrl_urb;
376 unsigned char ctrl_urb_buffer[8];
377 int ctrl_urb_busy;
378 struct usb_ctrlrequest ctrl_urb_setup;
379 wait_queue_head_t ctrl_urb_wq; /* Processes waiting */
380
381 /* configuration part */
382 int have_tuner;
383 int tuner_type;
384 int bridge_type; /* NT1003, NT1004, NT1005 */
385 int radio;
386 int video_inputs; /* # of inputs */
387 unsigned long freq;
388 int audio_mute;
389 int audio_channel;
390 int isoc_mode; /* format of video data for the usb isoc-transfer */
391 unsigned int nr; /* Number of the device */
392
393 /* Device structure */
394 struct usb_device *dev;
395 /* usb transfer */
396 int num_alt; /* Number of alternative settings */
397 unsigned int *alt_max_pkt_size; /* array of max_packet_size */
398 unsigned char iface; /* Video interface number */
399 unsigned char iface_alt; /* Alt settings */
400 unsigned char vin_reg2_preset;
401 struct mutex v4l2_lock;
402 struct timer_list power_off_timer;
403 struct work_struct power_off_work;
404 int power; /* is the device powered on? */
405 int user; /* user count for exclusive use */
406 int initialized; /* Had we already sent init sequence? */
407 int dev_model; /* What type of USBVISION device we got? */
408 enum stream_state streaming; /* Are we streaming Isochronous? */
409 int last_error; /* What calamity struck us? */
410 int curwidth; /* width of the frame the device is currently set to*/
411 int curheight; /* height of the frame the device is currently set to*/
412 int stretch_width; /* stretch-factor for frame width (from usb to screen)*/
413 int stretch_height; /* stretch-factor for frame height (from usb to screen)*/
414 char *fbuf; /* Videodev buffer area for mmap*/
415 int max_frame_size; /* Bytes in one video frame */
416 int fbuf_size; /* Videodev buffer size */
417 spinlock_t queue_lock; /* spinlock for protecting mods on inqueue and outqueue */
418 struct list_head inqueue, outqueue; /* queued frame list and ready to dequeue frame list */
419 wait_queue_head_t wait_frame; /* Processes waiting */
420 wait_queue_head_t wait_stream; /* Processes waiting */
421 struct usbvision_frame *cur_frame; /* pointer to current frame, set by usbvision_find_header */
422 struct usbvision_frame frame[USBVISION_NUMFRAMES]; /* frame buffer */
423 int num_frames; /* number of frames allocated */
424 struct usbvision_sbuf sbuf[USBVISION_NUMSBUF]; /* S buffering */
425 volatile int remove_pending; /* If set then about to exit */
426
427 /* Scratch space from the Isochronous Pipe.*/
428 unsigned char *scratch;
429 int scratch_read_ptr;
430 int scratch_write_ptr;
431 int scratch_headermarker[USBVISION_NUM_HEADERMARKER];
432 int scratch_headermarker_read_ptr;
433 int scratch_headermarker_write_ptr;
434 enum isoc_state isocstate;
435 struct usbvision_v4l2_format_st palette;
436
437 struct v4l2_capability vcap; /* Video capabilities */
438 unsigned int ctl_input; /* selected input */
439 v4l2_std_id tvnorm_id; /* selected tv norm */
440 unsigned char video_endp; /* 0x82 for USBVISION devices based */
441
442 /* Decompression stuff: */
443 unsigned char *intra_frame_buffer; /* Buffer for reference frame */
444 int block_pos; /* for test only */
445 int request_intra; /* 0 = normal; 1 = intra frame is requested; */
446 int last_isoc_frame_num; /* check for lost isoc frames */
447 int isoc_packet_size; /* need to calculate used_bandwidth */
448 int used_bandwidth; /* used bandwidth 0-100%, need to set compr_level */
449 int compr_level; /* How strong (100) or weak (0) is compression */
450 int last_compr_level; /* How strong (100) or weak (0) was compression */
451 int usb_bandwidth; /* Mbit/s */
452
453 /* Statistics that can be overlayed on the screen */
454 unsigned long isoc_urb_count; /* How many URBs we received so far */
455 unsigned long urb_length; /* Length of last URB */
456 unsigned long isoc_data_count; /* How many bytes we received */
457 unsigned long header_count; /* How many frame headers we found */
458 unsigned long scratch_ovf_count; /* How many times we overflowed scratch */
459 unsigned long isoc_skip_count; /* How many empty ISO packets received */
460 unsigned long isoc_err_count; /* How many bad ISO packets received */
461 unsigned long isoc_packet_count; /* How many packets we totally got */
462 unsigned long time_in_irq; /* How long do we need for interrupt */
463 int isoc_measure_bandwidth_count;
464 int frame_num; /* How many video frames we send to user */
465 int max_strip_len; /* How big is the biggest strip */
466 int comprblock_pos;
467 int strip_len_errors; /* How many times was block_pos greater than strip_len */
468 int strip_magic_errors;
469 int strip_line_number_errors;
470 int compr_block_types[4];
471 };
472
to_usbvision(struct v4l2_device * v4l2_dev)473 static inline struct usb_usbvision *to_usbvision(struct v4l2_device *v4l2_dev)
474 {
475 return container_of(v4l2_dev, struct usb_usbvision, v4l2_dev);
476 }
477
478 #define call_all(usbvision, o, f, args...) \
479 v4l2_device_call_all(&usbvision->v4l2_dev, 0, o, f, ##args)
480
481 /* --------------------------------------------------------------- */
482 /* defined in usbvision-i2c.c */
483 /* i2c-algo-usb declaration */
484 /* --------------------------------------------------------------- */
485
486 /* ----------------------------------------------------------------------- */
487 /* usbvision specific I2C functions */
488 /* ----------------------------------------------------------------------- */
489 int usbvision_i2c_register(struct usb_usbvision *usbvision);
490 int usbvision_i2c_unregister(struct usb_usbvision *usbvision);
491
492 /* defined in usbvision-core.c */
493 int usbvision_read_reg(struct usb_usbvision *usbvision, unsigned char reg);
494 int usbvision_write_reg(struct usb_usbvision *usbvision, unsigned char reg,
495 unsigned char value);
496
497 int usbvision_frames_alloc(struct usb_usbvision *usbvision, int number_of_frames);
498 void usbvision_frames_free(struct usb_usbvision *usbvision);
499 int usbvision_scratch_alloc(struct usb_usbvision *usbvision);
500 void usbvision_scratch_free(struct usb_usbvision *usbvision);
501 int usbvision_decompress_alloc(struct usb_usbvision *usbvision);
502 void usbvision_decompress_free(struct usb_usbvision *usbvision);
503
504 int usbvision_setup(struct usb_usbvision *usbvision, int format);
505 int usbvision_init_isoc(struct usb_usbvision *usbvision);
506 int usbvision_restart_isoc(struct usb_usbvision *usbvision);
507 void usbvision_stop_isoc(struct usb_usbvision *usbvision);
508 int usbvision_set_alternate(struct usb_usbvision *dev);
509
510 int usbvision_set_audio(struct usb_usbvision *usbvision, int audio_channel);
511 int usbvision_audio_off(struct usb_usbvision *usbvision);
512
513 int usbvision_begin_streaming(struct usb_usbvision *usbvision);
514 void usbvision_empty_framequeues(struct usb_usbvision *dev);
515 int usbvision_stream_interrupt(struct usb_usbvision *dev);
516
517 int usbvision_muxsel(struct usb_usbvision *usbvision, int channel);
518 int usbvision_set_input(struct usb_usbvision *usbvision);
519 int usbvision_set_output(struct usb_usbvision *usbvision, int width, int height);
520
521 void usbvision_init_power_off_timer(struct usb_usbvision *usbvision);
522 void usbvision_set_power_off_timer(struct usb_usbvision *usbvision);
523 void usbvision_reset_power_off_timer(struct usb_usbvision *usbvision);
524 int usbvision_power_off(struct usb_usbvision *usbvision);
525 int usbvision_power_on(struct usb_usbvision *usbvision);
526
527 #endif /* __LINUX_USBVISION_H */
528
529 /*
530 * Overrides for Emacs so that we follow Linus's tabbing style.
531 * ---------------------------------------------------------------------------
532 * Local variables:
533 * c-basic-offset: 8
534 * End:
535 */
536